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Contract OI history

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Jan 21, 2028 EXPIRATION

ONON $27.50 Put

ONON280121P00027500

Latest saved OI3,142Oct 23, 2026
Last change-11vs previous saved observation
Saved market days12Oct 02, 2026 onwards
Daily open interest Hover a point for its date and OI
ONON $27.50 put open interest history 12 saved observations from 2026-10-02 to 2026-10-23. Exact values and changes are listed in the table below. 3,1601,5800 2026-10-02: 2,529 OI2026-10-05: 2,529 OI2026-10-06: 2,619 OI2026-10-07: 2,619 OI2026-10-08: 2,619 OI2026-10-09: 2,618 OI2026-10-13: 3,160 OI2026-10-14: 3,160 OI2026-10-15: 3,159 OI2026-10-16: 3,159 OI2026-10-21: 3,153 OI2026-10-23: 3,142 OI Oct 02, 2026Oct 23, 2026

All saved dates are shown. Changes compare consecutive saved observations. Missing observations are not filled with zero.

ONON contract OI by effective market date, newest first
Market dateOpen interestChange vs prior saved day
Oct 23, 2026Viewing3,142-11
Oct 21, 20263,153-6
Oct 16, 20263,1590
Oct 15, 20263,159-1
Oct 14, 20263,1600
Oct 13, 20263,160+542
Oct 09, 20262,618-1
Oct 08, 20262,6190
Oct 07, 20262,6190
Oct 06, 20262,619+90
Oct 05, 20262,5290
Oct 02, 20262,529No prior observation